JP3205514B2 - Chamfering machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable chamfering machine capable of chamfering an outer peripheral edge portion of a workpiece and an inner peripheral edge portion such as a hole or a groove. The present invention relates to a chamfering machine capable of easily replacing a cutting tip without removing an adjust ring provided for adjusting a chamfer amount from a holder case on a main body side.

[0002]

2. Description of the Related Art The configuration of a known chamfering machine is changed to a real honest 7-80.
Referring to FIG. 87, FIG. 7 is a front sectional view of the chamfering machine. In the figure, reference numeral 50 denotes a casing having a built-in air motor 51 as a drive source. A motor shaft 52 of the air motor has a casing 50 via a pair of ball bearings 53 and 54.
It is pivoted on. A rotating shaft 55 is coaxially screwed to the motor shaft 52 protruding from the lower end of the casing 50, and a cutting tip 56 is fixed to the rotating shaft 55 by a screw 66. At the lower end of the casing 50, an annular connector 57 whose axis coincides with the rotating shaft 55 is fixed 58. On the inner peripheral surface and the outer peripheral surface of the annular connector 57, a female screw 59 and a male screw 60 are individually provided. Is formed.

The female screw 59 of the annular connector 57 has
A male screw 64 formed on the outer peripheral surface of the annular boss 63 of the guide base 62 placed on the surface of the workpiece 61 is fitted,
The guide base 62 is detachably fixed to the annular connector 57. The rotation shaft 55 projects through the center of the annular boss 63 toward the bottom surface of the guide base 62.
A square cutting tip 56 having cutting blades 65 on four sides,
The chip 56 is detachably fixed with screws 66 while looking at a part from the bottom surface side of the guide base 62 so that one side of the chip 56 faces the bottom surface of the guide base 62 at an angle of, for example, 45 °. A guide bearing 67 that can rotate in contact with the side surface of the processed portion 61 is fixed to the tip of the rotating shaft 55 with a cap nut 68.

The amount of chamfering C of the cutting tip 56 by the cutting blade 65 is, as shown in the figure, the point where the cutting blade 65 intersects the bottom surface of the guide base 62 when the cutting tip 56 faces the front. The dimensions correspond to the horizontal distance between the bearing 67 and the outer peripheral surface. Accordingly, by rotating the annular boss 63 screw-engaged with the annular connector 57 together with the guide base 62 and moving the guide base 62 in the axial direction of the rotary shaft 55, in other words, the cutting blade 65 is moved to the guide base 62. The amount of chamfering C can be adjusted by adjusting the amount of peeping downward.
At this time, the moving amount of the guide base 62 is
7 is uniquely determined by the thread pitch of the female screw 59 and the number of rotations of the guide base 62. When the annular boss 63 is detached from the annular connector 57, the cutting tip 56 is completely exposed to the outside.

A female screw formed on the inner peripheral surface of the lock ring 69 is screwed with the male screw 60 of the annular connector 57.
When the lock ring 69 is tightened, the annular connector 57 and the annular boss 63 are fixed, and when the lock ring 69 is loosened, the fixed state between the annular connector 57 and the annular boss 63 can be released.

In the above apparatus, in order to adjust the chamfer amount C, the tightening state between the annular connector 57 and the annular boss 63 is released by turning the lock ring 69 in the loosening direction. In this state, the annular boss 6 screwed into the annular connector 57
3 is rotated together with the guide base 62, and the amount of protrusion of the cutting tip 56 partially seen from the lower surface of the guide base 62 is changed so as to obtain a required chamfer amount C. Thereafter, the lock ring 69 is again turned in the tightening direction so that the annular boss 6 is rotated.
3 and the annular connector 57 are firmly screwed together.
After setting the chamfer amount C in this manner, the switch lever 70 of the air motor 51 is operated, the air motor 51 is started to rotate the rotating shaft, and the bottom surface of the guide base is placed on the surface of the workpiece. When the chamfering machine is moved while pressing the outer peripheral portion of the guide bearing against the end face of the workpiece, the cutting blade fixed to the rotating shaft together with the guide bearing chamfers the ridgeline of the workpiece.

When the cutting tip 56 is to be replaced, the annular boss 63, which is screwed into the annular connector 57, is rotated together with the guide base 62 while the lock ring 69 is loosened in the same manner as in the operation for adjusting the amount of chamfering. The cutting tip 56 is completely exposed to the outside. In this state, the screw 66 is loosened to replace the cutting tip 56 with another tip, or the cutting tip 56 is turned 90 ° to remove an unused cutting blade 65. Bring to working position.

[0008]

In the above-mentioned chamfering machine, when replacing a worn or damaged cutting tip as described above, the lock ring 69 is loosened in the same manner as in the operation for adjusting the amount of chamfering. It is necessary to rotate the annular boss 63 screw-engaged with the annular connector 57 together with the guide base 62 and remove it from the annular connector 57 to completely expose the cutting tip to the outside. That is, since the position of the screw 66 fixing the cutting tip and the position of the guide base 62 overlap, a tool for loosening the screw cannot be used, and unless the annular boss 63 is removed from the annular connector 57. And the cutting tip 56 could not be replaced.

Thus, in this apparatus, the cutting tip 56
When replacing the ring, the annular boss 63 to be screw-fitted to the annular connector 57 must be turned together with the guide base 62 while the lock ring 69 is loosened, and removed from the annular connector 57 to completely expose the cutting tip 56 to the outside. There is
The work of replacing the cutting tip 56 was very troublesome. After the cutting tip 56 is replaced, the annular boss 63 and the guide base 62 are again rotated to be screw-fitted to the annular connector 57, and then the chamfer amount is adjusted while rotating the annular boss 63 and the guide base 62 again. And there is a problem that work efficiency is poor.

Therefore, the present invention provides a method for removing an adjust ring (annular boss) and a guide plate (guide base) from a bearing case (annular connector).
The present invention proposes a chamfering machine which can easily change a cutting tip and does not need to adjust a chamfering amount again even after the cutting tip is changed, so as to solve the above problems.

According to the present invention, the adjusting ring and the guide plate are not integrated, but an opening / closing mechanism for swinging the guide plate with respect to the adjusting ring is provided, and when the cutting tip needs to be replaced, the opening / closing mechanism is fixed. The lock mechanism is removed, and the guide plate is pivotally opened by 90 ° with respect to the adjust ring so that the cutting tip can be completely exposed to the outside, so that the cutting tip can be easily replaced. Also, since the relative position between the adjust ring and the holder case does not change when the cutting tip is replaced, after replacing the cutting tip, the guide plate is returned to the original state, and the adjust ring and the guide plate are fixed by the lock mechanism. Just by doing, the already set chamfering amount can be secured, and the chamfering operation can be performed immediately, so that the working efficiency is extremely good. That is, there is no need to readjust the amount of chamfering each time a cutting tip is replaced unlike a conventional chamfering machine.

[0012]

Means for Solving the Problems In order to achieve the above object, a technical solution adopted by the present invention is to provide a bearing case for holding a drive shaft protruding from the casing at a lower end of the casing, wherein the bearing case is detachably mounted. A holder case is freely provided, the holder case further includes a cutting tip and supports a holder that rotates integrally with the drive shaft, and a male screw is formed on an outer periphery of a lower end of the holder case,
The adjusting ring having a split is screwed into the male screw so that the chamfer amount of the cutting tip can be adjusted, and the adjust ring is tightened with the chamfer amount of the cutting tip adjusted. The adjuster ring can be fixed by fixing the amount of chamfering.In addition, a lock means is provided on the end surface of the adjuster ring. And a guide plate which swings open and close with respect to the adjust ring when the lock means is released, and wherein the lock means is released to open the guide plate so that the cutting tip can be replaced. It is a chamfering machine. Further, the adjust ring and the guide plate are attached so as to be openable and closable via a shaft, and the guide plate is opened and closed with respect to the adjust ring so that the cutting tip mounting portion of the holder can be exposed. It is a chamfering machine.

A bearing case for holding a drive shaft protruding from the casing is provided at a lower end of the casing, a detachable holder case is provided for the bearing case, a cutting tip is provided for the holder case, and the drive shaft is provided with a cutting tip. An adjusting ring that can adjust the chamfering amount of the cutting tip is screwed into the holder case. The adjusting case is fixed to an end surface of the adjusting ring by a locking means while being in contact with the adjusting ring. A chamfering machine characterized in that a guide plate that opens and closes swingably with respect to the adjust ring when the means is released is provided, and the lock means is released to open the guide plate so that the cutting tip can be replaced. is there.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a chamfering machine according to the present invention, in which a cutting tip can be easily replaced.
Is a front cross-sectional view of a chamfering machine according to the present embodiment, FIG. 2 is an enlarged cross-sectional view of a holder case that supports a holder to which a cutting tip is fixed, and FIG. 3 is a cutaway view of a guide plate of the chamfering machine. It is a side view of a state.

1 to 3, reference numeral 1 denotes a casing housing a motor 2 as a drive source, and an output shaft 2a of the motor 2 is transmitted to a drive shaft 4 via gears 3 and 3 '.
The drive shaft 4 is rotatably supported by the casing 1 via a pair of bearings 5 and 6, and the end of the drive shaft 4 protrudes from the casing 1. The attached holder 8 (to be described in detail later) is attached so as to rotate integrally. A bearing case 9 for inserting and fixing a holder case 10 to be described later is formed at a lower end portion of the casing 1 in the drawing.

The holder case 10 inserted and fixed to the bearing case 9 has a fitting portion 11 formed on the casing 1 for fitting to the bearing case 9.
3 is fixed to the bearing case 9 by screws 10a (four places) shown in FIG. As a means for fixing the holder case 10 to the bearing case 9, any other type of fixing means can be adopted as long as it can perform the function of securely fixing the holder case 10 to the bearing case 9. .

Further, the holder case 10 is provided with three screw press-in recesses 11a for holding the outer ring of the bearing 14 which supports the holder 8 axially. Holder case 10
2, a holder 8 for mounting a cutting tip 7 as shown in FIG.
The holder 8 and the bearings 14 and 15 are rotatably held by the screw pressing recesses 11 and 4.
a screw 16 (3 places) and stop ring 1
7 prevent the holder case 10 from coming off.

The holder 8 supported by the ball bearings 14 and 15 has a form shown in FIGS. 4A to 4E. A hole 18 for connecting the drive shaft 4 is formed at the center of the holder. A cutting tip mounting portion 19 is formed on the holder head 8a and can fix the cutting tip 7 with a set screw 24. The cutting tip mounting portion 19
A flat portion 19a is formed on the side opposite to. The flat portion 19a is for holding a tool for preventing rotation of the holder 8 when removing the cutting tip 7 from the cutting tip mounting portion 19. The holder 8 includes the drive shaft 4 as shown in FIG.
The guide roller 2 is inserted into the drive shaft 4 so as to rotate integrally with the drive shaft 4 via a key 13 provided on the side of the guide roller 2 and is rotatable in contact with the side surface of the portion to be processed.
0 is fixed by a nut 21. The holder 8 projects through the center of an adjust ring 22 to be described later toward the bottom surface of a guide plate 23 to be described later, and the cutting tip mounting portion 19 is provided with a square cutting tip 7 having cutting edges on four sides. 7 can be viewed from the bottom side of the guide plate 23 so that one side of the base 7 faces the bottom surface of the guide plate 23 at an angle of, for example, 45 °, and can be detachably fixed with a set screw 24. (See FIG. 3).

A male screw 25 is formed on the outer periphery of the lower end of the holder case 10, and a female screw 22a of the adjust ring 22 described below is screwed to the male screw 25. As shown in the plan view of FIG. 5, the adjust ring 22 has a split 22d formed at one peripheral portion, and a pin 22b (see FIG. 3) stands upright at the lower end. The pin 22b allows a tool 33 for preventing rotation of the holder 8 when the cutting tip 7 is removed from the cutting tip mounting portion 19 to be held between the flat portion 19a on the holder 8 side. Also, the adjust ring 22 is the holder case 1
The female screw 22a of the adjust ring 22 is screwed to the male screw 25 formed on the outer periphery of the lower end of the 0, and the split 22d can be fixed to the holder case by tightening with the bolt 12.

In FIG. 2, the adjust ring 22
A guide plate 23 to which a guide ring 26 is fixed is pivotally mounted on a lower surface of the guide plate 26 so as to be swingable about a shaft 27. Has been fixed. The stopper 29 constitutes a lock mechanism for fixing the guide plate 23 to the lower surface of the adjust ring 22.
On the lower surface of the stopper 29, a groove 29a for locking the lock wire 30 is formed. The lock wire 30 is attached to a lever 31 which is pivotally supported on the outer peripheral convex portion 22c of the adjust ring 22 so that the lock wire 30 is engaged with the groove 29a. When the guide ring 26 is rotated upward with respect to the center, the guide ring 26 fixed to the guide plate 23 can be abutted and fixed to the adjust ring 22. A concave portion for preventing the stopper 29 from shifting is formed in the convex portion 22c that comes into contact with the stopper 29. The lock mechanism includes the lever 31, the lock wire 30, and the stopper 2 described above.
9.

As shown in FIG. 3, the amount of chamfering C of the work by the cutting tip 7 is as follows. When the holder case 10 is fixed to the bearing case 9 of the casing 1 and the cutting tip 7 faces front, as shown in FIG. The dimension corresponds to the horizontal distance between the point at which the cutting blade intersects the bottom surface of the guide plate 23 and the outer peripheral surface of the guide roller 20. Therefore, the adjust ring 2 screwed into the holder case 10 fixed together with the bearing case 9 of the casing 1
2 by rotating the guide plate 23 with the guide plate 23 and moving the guide plate 23 in the axial direction of the holder 8, in other words, by adjusting the amount by which the cutting blade can be seen below the guide plate 23, to reduce the chamfer amount C. Adjustment is possible. At this time, the moving amount of the guide plate 23 is uniquely determined by the screw pitch of the male screw 25 of the holder case 10 and the rotation speed of the adjust ring 22.
After the adjust ring is positioned, the split 22d formed on the adjust ring can be fixed to the holder case by tightening with the bolt 12.

Next, the operation of the chamfering machine configured as described above will be described. A holder 8 is mounted on a bearing case 9 of a casing 1 containing a motor 2 as a drive source.
Insert the fitting part of the holder case 10 with
In this state, the holder case 10 is fixed to the bearing case 9 with the screws 10a shown in FIG. At this time, as a matter of course, the drive shaft 4 is fitted into a hole formed in the holder 8 and connected by the key 13 so as to rotate integrally.

The work chamfer amount C is fixed to the casing 1 as described above when the cutting tip 7 faces forward as shown in FIG. 3 after the bolt 12 of the split 22d of the adjust ring 22 is loosened. The adjuster ring 22 to be screwed into the holder case 10 is rotated together with the guide plate 23 so that the guide plate 2
3 is moved in the axial direction of the holder 8, whereby the chamfer amount C is adjusted. Then, after setting the chamfer amount C, the bolt 12 of the split 22d is tightened, and the adjust ring is fixed to the holder case 10, thereby completing the chamfer amount C setting operation. Thereafter, the motor 2 is started to rotate the output shaft 2a and the drive shaft 4 via the gears 3 and 3 ', and the bottom surface of the guide plate 23 is placed on the surface of the workpiece (work). When the chamfering machine is moved while pressing the outer peripheral portion against the end face of the workpiece, the guide roller 20
At the same time, the cutting tip 7 fixed to the rotating shaft chamfers the ridge of the workpiece.

When the cutting tip 7 is replaced,
As shown in FIG. 6, the lever 31 of the lock mechanism is turned to the guide plate side to remove the lock wire 30 from the stopper 29, the guide plate 23 is swung downward, and the cutting attached to the holder 8 as shown in FIG. The chip 7 is exposed. In this state, the tool 33 is held between the guide pin 22b provided on the adjust ring 22 and the flat portion 19a formed on the holder head 8a, and the rotation of the holder 8 is prevented. The set screw 24 fixing the cutting tip 7 is loosened by the wrench 33 to replace the cutting tip 7 with another tip, or to replace the cutting tip 7 with 90
Then, an unused cutting blade 7a is mounted on the cut surface side of the workpiece by turning the blade. When the replacement of the cutting tip 7 is completed, the guide plate 23 is pulled up again as shown in FIG. 2, and the lever 31 is swung upward with the lock wire 30 of the lock mechanism engaged with the groove 29 a on the lower surface of the stopper 29. Thus, the guide ring 26 that fixes the guide plate 23 can be abutted and fixed to the adjust ring 22. In this state, since the relative position between the holder case 10 and the adjust ring 22 does not change, the cutting tip 7 is fixed at the same position as the chamfer amount before the replacement, so that the conventional adjustment of the chamfer amount is performed. Is unnecessary.

In the above example, the adjustment ring 22 and the guide ring 26 are fixed by using a lever, a lock wire,
It is performed by a lock mechanism consisting of a stopper,
As long as the mechanism is capable of fixing the adjust ring and the guide ring 26, various mechanisms including screws and the like can be used. Furthermore, the present invention may be embodied in various other forms without departing from the spirit or main features thereof, and the above-described embodiments are merely illustrative in all respects, and Not be.

[0026]

As described in detail above, according to the present invention,
An adjuster ring for adjusting the amount of chamfering is screwed into a holder case that can be attached to and detached from the chamfering machine main casing, and a guide plate having a guide ring fixed to the adjuster ring is provided so as to be swingable. Since the locking mechanism for fixing is provided, if it becomes necessary to replace the worn cutting tip, the locking mechanism is removed and the guide ring and the guide plate are pivotally released downward to expose the cutting tip fixed to the holder. As a result, the cutting tip can be easily replaced. In addition, when replacing the cutting tip, the split part formed on the adjust ring is fixed to the holder case by bolts, so when replacing the cutting tip, the relative positional relationship between the adjust ring and the holder case is changed. After changing the cutting tip without changing,
Just by fixing the guide ring and the guide plate to the adjust ring again, the chamfer amount before the cutting tip is replaced can be reproduced. Therefore, it is possible to obtain excellent effects such as the necessity of re-adjusting the chamfer amount performed after the cutting tip replacement work as in the related art is unnecessary.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a chamfering machine according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a holder case that supports a holder to which a cutting tip is fixed in a shaft.

FIG. 3 is a side view of the chamfering machine with a guide plate partially cut away.

FIG. 4 is a front view (b), a side view (a), a plan view (d), a half-section view (c) of the holder, and a bottom view (e) of the holder in a cross section.

FIG. 5 is a bottom view of the adjuster ring and the holder as viewed from below.

FIG. 6 is a cross-sectional view of a holder case in which a guide plate is opened when a cutting tip is replaced.

FIG. 7 is a front sectional view of a conventional chamfering machine.

[Explanation of symbols]

 Reference Signs List 2 Motor 3, 3 'Gear 4 Drive shaft 7 Cutting tip 8 Holder 9 Bearing case 10 Holder case 20 Guide roller 21 Nut 22 Adjust ring 23 Guide plate 26 Guide ring 29 Stopper 30 Lock wire 31 Lever 33 Tool

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23C 3/12

Claims (2)

(57) [Claims] A bearing case is provided at a lower end of a casing for holding a drive shaft protruding from the casing, a holder case is detachably provided in the bearing case, and a cutting tip is provided in the holder case and the driving case is provided. The holder that rotates integrally with the shaft is supported, an external thread is formed on the outer periphery of the lower end of the holder case, and an adjust ring having a split in the external thread is screwed together so that the chamfer amount of the cutting tip can be adjusted. By tightening the split of the adjust ring in a state where the chamfer amount of the cutting tip is adjusted, the adjust ring is fixed to the holder case so that the chamfer amount by the cutting tip can be fixed, and the end face of the adjust ring is further provided. Locking means is provided, and the locking means abuts against the adjust ring. By doing so, the chamfer amount is reproduced, and a guide plate that swings open and close with respect to the adjust ring when the lock means is released is provided, and the lock means is released to open the guide plate so that the cutting tip can be replaced. A beveling machine characterized by: 2. The adjusting ring and the guide plate are mounted to be openable and closable via a shaft, and the guide plate is opened and closed with respect to the adjust ring so that the cutting tip mounting portion of the holder can be exposed. The chamfering machine according to claim 1, wherein: